Dilatometric and Dielectric Studies of Ferroelectric NaNO2in the Vicinity of the Curie Temperature

Autor:	Toshiharu Mitsui, Toshihisa Yamaguchi
Rok vydání:	2004
Předmět:	Phase transition Materials science Condensed matter physics Phase (matter) Curie temperature Dilatometer Dielectric Condensed Matter Physics Ferroelectricity Néel temperature Thermal expansion Electronic Optical and Magnetic Materials
Zdroj:	Ferroelectrics. 301:151-156
ISSN:	1563-5112 0015-0193
DOI:	10.1080/00150190490455656
Popis:	In order to study the phase transitions of ferroelectric NaNO2 near the Curie temperature TC and the Neel temperature TN, the linear thermal expansions xi(i=a, b, c) and the dielectric constant ϵb of the single crystals were simultaneously measured. The formers were measured by means of a clip-type strain gauge dilatometer and the latter was measured on the frequency of 100 kHz by the temperature rate of change of 10 mK/min. The dc biasing field of 4 kV/m was intermittently applied for every other second in order to avoid the influence of ferroelectric domain existence. Each coefficient αi(i=a, b, c) of the linear thermal expansion showed some anomalies around the TC and a λ -type anomaly at the TN. No other evidence of a phase transition was found in the antiferroelectric phase between the TC and the TN except around the TC.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::70a8899f08f91b6aa8e47131994a23d0 https://doi.org/10.1080/00150190490455656 Zobrazit plný text záznamu